KR20180040190A - Display apparatus - Google Patents

Abstract

For a display device capable of simplifying a process and minimizing a defective rate in a manufacturing process, the present invention provides the display device which includes: a lower substrate which is bent based on a first bending axis along a first direction; an upper substrate which is arranged to face the lower substrate and has a first surface facing the lower substrate; a pixel electrode arranged on the lower substrate; a color filter arranged on the lower substrate to correspond to the pixel electrode; and a first column spacer which is arranged on the first surface to correspond to at least a part of the color filter and is extended along a second direction across the first direction.

Description

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device in which a process is simplified and a defect rate in a manufacturing process is minimized.

As various electronic devices such as a mobile phone, a PDA, a computer, and a large-sized TV are developed, there is an increasing demand for a display device that can be applied thereto. Liquid crystal displays (LCDs) among display devices have advantages such as low power consumption, easy moving image display, and high contrast ratio.

Such a liquid crystal display device includes a liquid crystal layer disposed between an upper substrate and a lower substrate, and by applying an electric field to the liquid crystal layer, the alignment direction of the liquid crystal molecules is changed to realize a difference in transmittance. Such a liquid crystal display device may be formed to have various shapes in the form of a curved or flexible display in addition to a flat panel display according to recent technology trends.

However, such a conventional display device has a problem that an additional process is required to align an upper substrate and a lower substrate in a process step of joining an upper substrate and a lower substrate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a display device in which the process is simplified and the defect rate in the manufacturing process is minimized. However, these problems are exemplary and do not limit the scope of the present invention.

According to one aspect of the present invention, there is provided a semiconductor device comprising: a lower substrate bended with respect to a first bending axis along a first direction; An upper substrate facing the lower substrate and having a first surface facing the lower substrate; A pixel electrode disposed on the lower substrate; A color filter disposed on the lower substrate to correspond to the pixel electrode; And a first column spacer disposed on the first surface and corresponding to at least a portion of the color filter, the first column spacer extending along a second direction intersecting with the first direction.

In the present embodiment, the first direction and the second direction may be orthogonal.

In this embodiment, the upper substrate may be bent with respect to a second bending axis along a third direction that intersects the second direction.

In the present embodiment, the third direction may be parallel to the first direction.

In this embodiment, the lower substrate may be bent at a first curvature, and the upper substrate may be bent at a second curvature different from the first curvature.

In this embodiment, the first curvature of the lower substrate may be greater than the second curvature of the upper substrate.

In the present embodiment, the pixel electrode may extend along the first direction.

In the present embodiment, the color filter may include at least one of a red color filter, a blue color filter, a green color filter, and a white color filter.

In this embodiment, the color filter may not overlap at least in some areas with the first column spacer.

In the present embodiment, the first column spacer may have a first region overlapping with the color filter and a second region not overlapping with the color filter.

In this embodiment, the first region may be located at the center of the first column spacer.

In the present embodiment, the second region may be located across the first region.

In the present embodiment, an organic film interposed between the color filter and the first column spacer may be further included.

In this embodiment, the first region of the first column spacer may be in contact with the organic film.

The second column spacer may further include a second column spacer disposed relatively farther from the first column spacer than a center axis of the upper substrate parallel to the second bending axis, The second length along the second direction may be longer than the first length along the second direction of the first column spacer.

The second column spacer may further include a second column spacer disposed relatively farther from the first column spacer than a center axis of the upper substrate parallel to the second bending axis, The second height may be higher than the first height of the first column spacer.

According to another aspect of the present invention, there is provided a plasma display panel comprising: a lower substrate; An upper substrate facing the lower substrate and having a first surface facing the lower substrate; A column spacer having a first region and a second region in contact with the first region, the column spacer being disposed on the first side of the upper substrate; And a color filter disposed on the lower substrate so as to overlap with the column spacer in the first region.

In this embodiment, the lower substrate may be bent with respect to the first bending axis along the first direction.

In this embodiment, the column spacer may extend along a second direction that intersects the first direction.

In this embodiment, the thickness of the portion corresponding to the first region may be thicker than the thickness of the portion corresponding to the second region.

In this embodiment, the organic light emitting display further includes an organic film interposed between the color filter and the column spacer, and the first region may be in contact with the organic film.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

These general and specific aspects may be implemented by using a system, method, computer program, or any combination of systems, methods, and computer programs.

According to one embodiment of the present invention as described above, a display device in which the process is simplified and the defect rate in the manufacturing process is minimized can be realized. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view schematically showing a display device according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a cross section taken along line AA of the display device of FIG.
2 is a plan view schematically showing an enlarged view of a portion A in Fig.
3 is a plan view schematically showing an enlarged view of a portion B in Fig.
4 is a cross-sectional view schematically showing a cross section taken along the CC line of the display device of Fig.
5 is a plan view schematically showing an enlarged part of FIG.
6 is a cross-sectional view schematically showing an embodiment of the display device of FIG.
7 is a cross-sectional view schematically showing an embodiment of the display device of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Also, the singular expressions include plural expressions unless the context clearly dictates otherwise.

On the other hand, the terms including or including mean that a feature or element described in the specification is present, and does not preclude the possibility of one or more other features or components being added. It is also to be understood that when a section of a film, an area, an element, etc. is referred to as being "on" or "on" another part, Areas, elements, and the like are interposed.

In the drawings, components may be exaggerated or reduced in size for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

The x-axis, y-axis, and z-axis are not limited to three axes on the orthogonal coordinate system, and can be interpreted in a broad sense including this. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.

If certain embodiments are otherwise feasible, the particular process sequence may be performed differently from the sequence described. For example, two processes that are described in succession may be performed substantially concurrently, and may be performed in the reverse order of the order described.

FIG. 1 is a perspective view schematically showing a display device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view schematically showing a cross section taken along line A-A of the display device of FIG.

Referring to Fig. 1, the display device according to the present embodiment has a generally bended shape as shown in Fig. It can be understood that the lower substrate 100 and the upper substrate 500 of the display device are bent when the display device has a bended shape as a whole. Such a bending-type display device can be formed by forming various layers on a generally flat substrate and then bending the substrate. In some cases, various layers may be formed on a substrate that is already bent have. Hereinafter, in some drawings, the display device is shown without bending for convenience of explanation.

The display device according to the present embodiment may be bent with respect to a bending axis BAX extending in one direction as shown in Fig. In this embodiment, the bending axis BAX may extend along the first direction (+ y direction).

Referring to FIG. 2, the display device according to the present embodiment includes a lower substrate 100 and an upper substrate 500 arranged to face the lower substrate 100. A liquid crystal layer 200 may be interposed between the lower substrate 100 and the upper substrate 500. The lower substrate 100 may be bent with respect to the first bending axis BAX1 extending in the first direction (+ y direction). The upper substrate 500 may be bent with respect to the second bending axis BAX2 extending in the third direction (+ y direction). In the present embodiment, the first direction (+ y direction) in which the first bending axis BAX1 of the lower substrate 100 extends is the third direction (+ y direction) in which the second bending axis BAX2 of the upper substrate 500 extends. y direction), so that the first bending axis BAX1 and the second bending axis BAX2 may be parallel to each other.

2, the display device according to the present embodiment may include a lower substrate 100 and an upper substrate 500 in a curved shape. The lower substrate 100 and the upper substrate 500 may be curved in the state where they are bonded to each other. In this case, the curvatures of the lower substrate 100 and the upper substrate 500 may be different from each other. That is, the lower substrate 100 may have a first radius of curvature R1 and the upper substrate 500 may have a second radius of curvature R2.

The first curvature radius R1 of the lower substrate 100 may be smaller than the second curvature radius R2 of the upper substrate 500. In this case, In other words, the curvature of the lower substrate 100 may be greater than the curvature of the upper substrate 500. That is, since the center of curvature of the lower substrate 100 and the upper substrate 500 to be curved is located close to the lower substrate 100, the curvature of the lower substrate 100 is formed larger than the curvature of the upper substrate 500 .

FIG. 3 is a plan view schematically showing an enlarged view of a portion B in FIG. 1, and FIG. 4 is a cross-sectional view schematically showing a cross section taken along line C-C of the display device of FIG.

Referring to FIGS. 3 and 4, the display device according to the present embodiment may include a plurality of sub-pixels. FIG. 3 shows a plurality of sub-pixels each having a color filter 300 that emits light of different colors. Each of the plurality of sub-pixels may be located in the pixel region P. [ The pixel regions P may be located on the lower substrate 100.

The lower substrate 100 may be a flexible substrate, and may be made of a plastic having excellent heat resistance and durability.

The upper substrate 500 facing the lower substrate 100 may be positioned on the lower substrate 100. The lower substrate 100 and the upper substrate 500 are disposed to face each other and the upper substrate 500 may have a first surface 500a facing the lower substrate 100. [ The upper substrate 500 may be a flexible substrate like the lower substrate 100, and may be made of a plastic having excellent heat resistance and durability.

For example, the lower substrate 100 and the upper substrate 500 may be formed of a material selected from the group consisting of polyethersulfone (PES), polyacrylate (PA), polyetherimide (PEI), polyethyelenene naphthalate ), Polyethyleneterephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC), cellulose triacetate cellulosetriacetate, cellulose acetate propionate (CAP), poly (arylene ether sulfone), and combinations thereof. However, the present invention is not limited thereto, and the lower substrate 100 and the upper substrate 500 may be formed of various materials such as metal or glass. The lower substrate 100 and the upper substrate 500 may be formed of the same material or different materials.

A gate wiring (not shown), a gate electrode 211 and a common wiring (not shown) are disposed on the lower substrate 100. The gate wiring extends along one direction, and the gate electrode 211 is connected to the gate wiring. The gate electrode 211 may extend from the gate wiring or may be part of the gate wiring.

The gate electrode 211 and the gate wiring may be formed of a metal such as aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), or the like in consideration of adhesiveness to an adjacent layer, surface flatness of a layer to be laminated, (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), molybdenum (Mo) Tungsten (W), copper (Cu), or the like.

The common wiring may extend parallel to the gate wiring along the one direction.

A gate insulating film 220 may be disposed on the gate wiring, the gate electrode 211, and the common wiring. The gate insulating film 220 may be formed of a single layer, for example, of silicon oxide and / or silicon nitride, or may be formed in multiple layers.

A semiconductor layer 212 may be disposed on the gate insulating layer 220 above the gate electrode 211. The semiconductor layer 212 may include an active layer 222a of amorphous silicon and an amorphous silicon ohmic contact layer 222b doped with an impurity.

A source electrode 214 and a drain electrode 216 may be disposed on the semiconductor layer 212. The source electrode 214 and the drain electrode 216 may be spaced apart from each other on the semiconductor layer 212 while the active layer 222a is partially exposed while the source electrode 214 and the drain electrode 216 are spaced apart. . At this time, the ohmic contact layer 222b may be formed to have the same shape as the source electrode 214 and the drain electrode 216.

The source electrode 214 and the drain electrode 216 may be formed of a material such as aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg) (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten Or may be formed as a single layer or multiple layers of one or more materials.

The gate electrode 211, the semiconductor layer 212, the source electrode 214 and the drain electrode 216 constitute a thin film transistor and the active layer exposed between the source electrode 214 and the drain electrode 216 is a thin film transistor As shown in FIG.

On the other hand, data lines (not shown) may be formed of the same material in the same layer as the source electrode 214 and the drain electrode 216. The data line extends along the other direction intersecting or perpendicular to the one direction, and intersects the gate line to define the pixel region (P). The data line may be connected to the source electrode 214.

A protective layer 230 is formed on the source electrode 214 and the drain electrode 216. The protective layer 230 may be formed as a single layer with a material such as, for example, silicon oxide and / or silicon nitride, or may be formed in multiple layers.

The color filter 300 may be disposed on the protective layer 230. The color filter 300 may be disposed in the pixel region P and positioned to correspond to the pixel electrode. The color filter 300 may include at least one of a red color filter 300R, a blue color filter 300B, a green color filter 300G and a white color filter and may correspond to one pixel region P have. 3, the red color filter 300R, the green color filter 300G, and the blue color filter 300B are sequentially arranged along the + x direction. However, the present invention is not limited to this, The arrangement order can be variously configured.

Although not shown, a light shielding layer may be disposed between the color filters 300.

An organic film 320 may be disposed on the color filter 300. The organic layer 320 may protect various devices and wires such as the color filter 300 and the thin film transistor. The organic layer 320 may be formed of a polymer such as an acrylic polymer such as polymethyl methacrylate (PMMA), a polystyrene (PS), a polymer derivative having a phenol group, an imide polymer, an arylether polymer, an amide polymer, a p-xylylene polymer, a vinyl alcohol polymer, and a mixture thereof, and the like.

On the other hand, a column spacer 400 may be disposed on the first surface 500a of the upper substrate 500. The first surface 500a of the upper substrate 500 is formed on the surface facing the lower substrate 100 while the column spacer 400 is formed on the first surface 500a of the upper substrate 500 and the column spacer 400 may be formed on the upper substrate 500 so as to face the lower substrate 100.

Although the column spacers 400 are shown as being arranged in each sub-pixel in FIG. 3, the column spacers 400 may be arranged in only some sub-pixels.

The column spacer 400 may serve to maintain a cell gap, that is, a gap between the lower substrate 100 and the upper substrate 500. The column spacer 400 of this embodiment is a main column spacer for maintaining a cell gap and an auxiliary column spacer for preventing deformation when pressure is applied to the upper substrate 500 or the lower substrate 100 As shown in FIG. The column spacer 400 of this embodiment can be arranged to directly contact the organic film 320 disposed at the uppermost one of the structures of the lower substrate 100 as shown in FIG. 4 as a main column spacer. On the other hand, the auxiliary column spacer may be disposed at a predetermined distance from the organic layer 320 disposed on the uppermost layer of the structure of the lower substrate 100.

Since the organic film 320 is disposed on the uppermost layer of the structure of the lower substrate 100 in this embodiment, the column spacer 400 is in contact with the organic film 320, The column spacer 400 may be provided so as to be in contact with the corresponding layer.

Such a column spacer 400 may be provided in a rectangular shape having a major axis and a minor axis, as shown in FIG. However, the shape of the column spacer 400 is not limited to a rectangular shape, but a shape having a long axis extending in one direction is sufficient.

The column spacer 400 according to the present embodiment may be formed to extend along the second direction (+ x direction). The second direction (+ x direction) may be defined as a direction intersecting the first direction (+ y direction), that is, the first bending axis BAX1 may intersect with the extending direction. In the present embodiment, the second direction (+ x direction) can be orthogonal to the first direction (+ y direction). In other words, the column spacer 400 may be provided to extend along a direction intersecting or preferably orthogonal to the direction in which the first bending axis BAX1 extends.

5 is a plan view schematically showing an enlarged part of FIG.

5, the periphery of the column spacer 400 shown in FIG. 3 is enlarged and shown. 5 illustrates a color filter 300 that overlaps a portion of the column spacer 400 and the color filter 300 may be at least one of a red color filter, a blue color filter, a green color filter, and a white color filter have.

5 and 3, the column spacer 400 may be disposed so as not to overlap at least a part of the area of the color filter 300. That is, the column spacer 400 may have a first region 400a and a second region 400b contacting the first region 400a. The first region 400a can be understood as a portion where the column spacer 400 overlaps with the color filter 300 and the second region 400b can be understood as a portion where the column spacer 400 does not overlap with the color filter 300 Can be understood as a part.

The first region 400a is defined as an area where the column spacer 400 overlaps with the color filter 300 and the second region 400b is defined as a region where the column spacer 400 is positioned between the color filter 300 and the color filter 300. [ It can be defined as an area that does not overlap. It can be understood that the color filter 300 is not arranged in at least some regions on the pixel region P. [ That is, the pixel region P has a region where the color filter 300 is not disposed, and a portion of the column spacer 400 located on the region is defined as the second region 400b. The second region 400b may be a region where the column spacer 400 and the color filter 300 do not overlap because the color filter 300 is not present. The first region 400a may be defined as an overlap region, and the second region 400b may be defined as a margin region.

5, the first area 400a, which is the overlap area, may be located at the center of the column spacer 400, and the second area 400b, which is the margin area, may be positioned between the first area 400a and the first area 400a. It can be placed on both sides. 5, the second region 400b is provided on both sides of the first region 400a with the same width, but in another embodiment, the second region 400b is located only on one side of the first region 400a The second region 400b may be located on both sides of the first region 400a and may include a second region 400b located on one side of the first region 400a and a second region 400b located on the other side of the first region 400a. 2 region 400b may be different from each other.

The column spacer 400 functions to maintain the cell gap between the lower substrate 100 and the upper substrate 500 as described above. For this purpose, the column spacer 400 is formed to contact the outermost portion of the layers of the lower substrate 100. The first region 400a of the column spacer 400 in this embodiment overlaps the circuit portion including the thin film transistor TFT disposed on the lower substrate 100 and the color filter 300 located on the upper portion thereof, And is in direct contact with the organic film 320 covering the filter 300.

Thus, the column spacer 400 according to the present embodiment is disposed on the first surface 500a of the upper substrate 500. [ Since the column spacer 400 is disposed on the upper substrate 500, in the display device having the shape bent as shown in FIG. 1, alignment defects may occur in the process of bending the lower substrate 100 and the upper substrate 500 . This is because the curvature of the lower substrate 100 and the curvature of the upper substrate 500 are different in the process of bending the lower substrate 100 and the upper substrate 500. Even when the color filter 300 located on the lower substrate 100 and the column spacer 400 located on the upper substrate 500 are aligned so as to be aligned in the case of the lower substrate 100 and the upper substrate 500 before bending, The curvatures of the lower substrate 100 and the upper substrate 500 may be different from each other in the process of bending the color filter 300 and the column spacer 400.

Therefore, conventionally, a column spacer is formed on a lower substrate in order to prevent such a problem as in the case of a curved display device. However, when the column spacer is formed on the lower substrate in this way, the column spacer should be formed on the uppermost layer among the layers formed on the lower substrate. As the height of the uppermost layer of the layers formed on the lower substrate is higher, The column spacer is difficult to form at a sufficient height and the width of the uppermost layer forming the column spacer is not sufficiently wide and the column spacer is caused to flow downward into the lower layer to form a column spacer at a sufficient height.

In the display device according to the present embodiment, the column spacer 400 is formed on the upper substrate 500. In the process of bending the upper substrate 500 and the lower substrate 100, alignment defects of the column spacer 400 The column spacer 400 may have a shape extending along a second direction (+ x direction) in which the column spacer 400 intersects with the bending axis.

The first region 400a in which the column spacer 400 overlaps with the color filter 300 is in contact with the organic film positioned on the color filter 300 to maintain the cell gap between the lower substrate 100 and the upper substrate 500 And the like. The second region 400b in which the column spacer 400 is not overlapped with the color filter 300 is an alignment margin region for the case where the position of the column spacer 400 is shifted at the time of bending, . As the column spacer 400 has an alignment margin area as in the present embodiment, a curved display device can be realized while minimizing the defective defective ratio.

6 is a cross-sectional view schematically showing an embodiment of the display device of FIG.

Fig. 6 shows a state in which the display device is curved. A plurality of column spacers 400 may be disposed on the upper substrate 500 and a plurality of color filters 300 may be disposed on the lower substrate 100. The plurality of column spacers 400 and the plurality of color filters 300 may be arranged to face each other. 6, a plurality of color filters 300 are disposed on the upper surface of the lower substrate 100. However, a plurality of color filters 300 are formed between the lower substrate 100 and the plurality of color filters 300, It goes without saying that an element layer can be further disposed.

Referring to FIG. 6, the display device according to the present embodiment may include a first column spacer 400 'and a second column spacer 400' '. Such a second column spacer 400 '' may be disposed relatively farther than the first column spacer 400 'relative to the center axis CAX of the upper substrate 500. The first column spacer 400 'and the second column spacer 400' 'may be formed to extend along the second direction (+ x direction) as in the above-described embodiment. The first column spacer 400 'has a first length w1 extending along the above-described second direction (+ x direction), and the second column spacer 400' 'has the above-mentioned second direction (+ x Lt; RTI ID = 0.0 > w2 < / RTI > In this embodiment, the second length w2 of the second column spacer 400 '' may be longer than the first length w1 of the first column spacer 400 '.

That is, the length of each of the first column spacer 400 'and the second column spacer 400' 'is longer than the central axis CAX of the upper substrate 500 with respect to the central axis CAX of the upper substrate 500 . Here, the length of the column spacer 400 means a length extending along the second direction (+ x direction). The center axis CAX of the upper substrate 500 may be defined as an axis passing through the center of the upper substrate 500 as an axis parallel to the second bending axis BAX2 of the upper substrate 500. [

When the upper substrate 500 and the lower substrate 100 are bent as in the display device according to the present embodiment, the distance from the center of the upper substrate 500 and the lower substrate 100, that is, The greater the probability that the upper substrate 500 and the lower substrate 100 are misaligned. Therefore, in this embodiment, as the distance from the center axis CAX of the upper substrate 500 increases, the length of the column spacer 400 disposed on the upper substrate 500 may be increased.

The first column spacer 400 'located closer to the central axis CAX as shown in FIG. 6 has a first length w1 and a second column spacer 400' located relatively away from the central axis CAX. 'Has a second length w2. At this time, the second length w2 of the second column spacer 400 '' may be longer than the first length w1 of the first column spacer 400 '. As the second length w2 of the second column spacer 400 '' is formed to be longer than the first length w1 of the first column spacer 400 ', the second column spacer 400' Can have a relatively longer margin area as compared to the column spacer 400 '.

That is, as shown in FIG. 6, the first column spacer 400 'may have a first region w11 overlapping with the lower color filter 300 and a second region w12 not overlapping. The second column spacer 400 '' may have a first region w21 overlapping with the lower color filter 300 and a second region w22 not overlapping with the lower color filter 300 '. In this case, the first region w11 of the first column spacer 400 'and the first region w21 of the second column spacer 400' 'may be the same. However, as the second length w2 of the second column spacer 400 '' is formed to be longer than the first length w1 of the first column spacer 400 ', the second column spacer 400' The second region w22 may be formed wider than the second region w12 of the first column spacer 400 '. Therefore, even if the alignment of the upper substrate 500 and the lower substrate 100 is shifted away from the center axis CAX of the upper substrate 500, the column spacer 400 can secure a sufficient margin region Thereby minimizing the defective alignment of the column spacer 400. FIG.

7 is a cross-sectional view schematically showing an embodiment of the display device of FIG.

7 shows a state in which the display device is curved. A plurality of column spacers 400 may be disposed on the upper substrate 500 and a plurality of color filters 300 may be disposed on the lower substrate 100. 7, a plurality of color filters 300 are disposed on the upper surface of the lower substrate 100. However, a plurality of color filters 300 may be disposed between the lower substrate 100 and the plurality of color filters 300, It goes without saying that the element layer on which the wirings are formed can be further arranged.

Referring to FIG. 7, the display device according to the present embodiment may include a first column spacer 400 'and a second column spacer 400' '. Such a second column spacer 400 '' may be disposed relatively farther than the first column spacer 400 'relative to the center axis CAX of the upper substrate 500.

In this embodiment, the distance between the lower substrate 100 and the upper substrate 500 may become larger as the distance from the central axis CAX of the upper substrate 500 increases. The distance d2 between the lower substrate 100 and the upper substrate 500 at the portion where the second column spacer 400 'is located is smaller than the distance d2 between the lower substrate 100 and the lower substrate 100' where the first column spacer 400 ' And the distance d1 between the upper substrate 500 and the upper substrate 500. [ This may be due to the difference in curvature of the lower substrate 100 and the upper substrate 500 as described above.

The first column spacer 400 'may have a first height t1 and the second column spacer 400' 'may have a second height t2. In this embodiment, the second height t2 of the second column spacer 400 '' may be higher than the first height t1 of the first column spacer 400 '.

That is, the height of each of the first column spacer 400 'and the second column spacer 400' 'is higher than the center axis CAX of the upper substrate 500 as the distance from the central axis CAX increases . In this case, the height of the column spacer 400 can be understood to mean a height as a thickness extending along the Z axis. The center axis CAX of the upper substrate 500 may be defined as an axis passing through the center of the upper substrate 500 as an axis parallel to the second bending axis BAX2 of the upper substrate 500. [

As described above, the display device according to the present embodiment is formed such that the curvatures of the upper substrate 500 and the lower substrate 100 are different from each other. In this case, the curvature of the lower substrate 100 is formed to be larger than the curvature of the upper substrate 500, and thus the curvature between the upper substrate 500 and the lower substrate 100 The distance between the two is further. The distance d2 of the second column spacer 400 '' disposed relatively farther from the center axis CAX of the upper substrate 500 is smaller than the distance d2 of the first column spacer 400 ' (d1).

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Lower substrate
200: liquid crystal layer
230: Protective layer
300: Color filter
320: organic film
400: Column spacer
400a: first region
400b: second region
400 ': first column spacer
400 ": second column spacer
500: upper substrate
500a: first side

Claims (20)

A lower substrate bended with respect to a first bending axis along a first direction;
An upper substrate facing the lower substrate and having a first surface facing the lower substrate;
A pixel electrode disposed on the lower substrate;
A color filter disposed on the lower substrate to correspond to the pixel electrode; And
A first column spacer disposed on the first surface to correspond to at least a portion of the color filter, the first column spacer extending along a second direction intersecting the first direction;
And a display device. The method according to claim 1,
Wherein the first direction and the second direction are orthogonal. 3. The method of claim 2,
Wherein the upper substrate is bent with respect to a second bending axis along a third direction intersecting the second direction. The method of claim 3,
And the third direction is parallel to the first direction. The method of claim 3,
Wherein the lower substrate is bent at a first curvature and the upper substrate is bent at a second curvature different from the first curvature. 6. The method of claim 5,
Wherein the first curvature of the lower substrate is larger than the second curvature of the upper substrate. The method according to claim 1,
And the pixel electrode extends along the first direction. The method according to claim 1,
Wherein the color filter comprises at least one of a red color filter, a blue color filter, a green color filter, and a white color filter. The method according to claim 1,
Wherein the color filter does not overlap at least in some areas with the first column spacer. The method according to claim 1,
Wherein the first column spacer has a first region overlapping the color filter and a second region not overlapping the color filter. 11. The method of claim 10,
And the first region is located at a central portion of the first column spacer. 11. The method of claim 10,
And the second region is located across the first region. 11. The method of claim 10,
And an organic film interposed between the color filter and the first column spacer. 14. The method of claim 13,
And the first region of the first column spacer is in contact with the organic film. The method of claim 3,
Further comprising a second column spacer disposed further away relative to the first column spacer relative to a central axis of the upper substrate parallel to the second bending axis,
Wherein the second length of the second column spacer along the second direction is longer than the first length of the first column spacer along the second direction. The method of claim 3,
Further comprising a second column spacer disposed further away relative to the first column spacer relative to a central axis of the upper substrate parallel to the second bending axis,
Wherein the second height of the second column spacer is higher than the first height of the first column spacer. A lower substrate bended with respect to a first bending axis along a first direction;
An upper substrate facing the lower substrate and having a first surface facing the lower substrate;
A column spacer having a first region and a second region in contact with the first region, the column spacer being disposed on the first side of the upper substrate; And
A color filter disposed on the lower substrate so as to overlap with the column spacer in the first region;
And a display device. 18. The method of claim 17,
Wherein the column spacer extends along a second direction that intersects the first direction. 18. The method of claim 17,
Wherein the thickness of the portion corresponding to the first region is thicker than the thickness of the portion corresponding to the second region. 18. The method of claim 17,
Further comprising an organic film interposed between the color filter and the column spacer, the first region being in contact with the organic film.

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